North London

N1 Islington
N2 East Finchley
N3 Finchley Central, Finchley Church End
N4 Finsbury Park
N5 Highbury
N6 Highgate
N7 Holloway
N8 Hornsey
N9 Lower Edmonton
N10 Muswell Hill
N11 New Southgate
N12 North Finchley
N13 Palmers Green
N14 Southgate
N15 South Tottenham, Seven Sisters
N16 Stoke Newington, Stamford Hill
N17 Tottenham
N18 Upper Edmonton
N19 Upper Holloway, Archway, Tufnell Park
N20 Whetstone
N21 Winchmore Hill
N22 Wood Green

North West London

NW1 Camden
NW2 Cricklewood
NW3 Hampstead, Belsize Park
NW4 Hendon
NW5 Kentish Town
NW6 West Hampstead, Kilburn
NW7 Mill Hill
NW8 St. John's Wood
NW9 Colindale
NW10 Harlesden, Park Royal
NW11 Golders Green

Greater London (North)

EN1 Enfield
EN2 Enfield Town
EN3 Ponders End
EN4 Cockfosters
EN5 Barnet

Greater London (North West)

HA0 Wembley
HA1 Harrow on the Hill
HA2 Harrow
HA3 Wealdstone
HA4 Ruislip
HA5 Pinner
HA6 Northwood
HA7 Stanmore
HA8 Edgware
HA9 Brent